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In this paper, design and development of broadband blade monopole antenna covering 0.5-1.5 GHz is presented with simulated and measured results. Blade monopole antennas are preferred antenna configurations for airborne platforms due to lower drag offered by them. The basic antenna element configuration is optimized by simulation studies using CST Microwave Suitetrade EM simulation software.
A circular patch antenna with a narrow slit is proposed to achieve multi frequency, dual band operation. The proposed antenna radiates at four different frequencies with sufficiently high matching with probe feed system. Among these four frequencies two frequencies 2.62 GHz and 5.82 GHz lies in lower and upper frequency band respectively of Wi-Max application created by IEEE 802.16 working group....
Modern RFID system demands for low cost and low profile antennas. Microstrip antenna offers a potential solution meeting those requirements. In this paper a new antenna design using a inset fed that is suitable for high gain microstrip antennas is presented.
A compact broadband microstrip bowtie antenna is proposed. By loading properly arranged slots in a bowtie patch antenna, broadband operation of a bowtie patch antenna are presented. The maximum impedance bandwidth achieved is 27% centered around 1.8 GHz, with good pattern characteristics.
In meander line antenna the size of the dipole at given frequency is reduced by a factor that is proportional to the number of turns. The adjacent horizontal segments of the meander line antenna have opposite phase. The transmission line current neither contributes much to the radiated power nor produce losses. At the location where the current reaches maximum value at that point large amount of power...
In this paper, the design and development of broadband, helical elements dipole antenna is presented. It offers higher gain compared to its conventional tubular elements counterpart of same physical dimensions. Both types of the dipole antennas, one with tubular elements and other with helical elements were constructed. These antennas were compared for their electrical parameters in the frequency...
A multiple slot microstrip patch antenna for wireless communication is presented. In this paper, inverted microstrip patch antenna, direct probe feed technique and the novel multiple shaped patch is integrated. This antenna offers low profile, wide bandwidth, high gain, and compact antenna element. The proposed multi-slotted microstrip patch antenna achieves a fractional bandwidth of 27.89% (1.82...
A novel single feed miniaturized cross patch antenna radiating at three resonant frequencies is presented. Compared to standard rectangular patches, the proposed antenna gives an area reduction of 82%, 74% and 53% for the linearly polarized radiations with center frequencies at 1.2395 GHz, 1.515 GHz, and 2.027 GHz respectively. The antenna exhibits nearly omnidirectional radiation characteristics...
This paper presents the design of 256 (16 times 16) elements planar microstrip array antenna at K-band frequencies using corporate feeding network. The array antenna has been designed and developed for miniaturized satellite communication (SATCOM) ground terminals. The impedance bandwidth achieved for VSWR Lt 2.0 is 540 MHz (~ 2.7%). The achieved mid-band gain of the array antenna is about 29 dBi...
A dual band RFID applications in 800 - 900 MHz and 2400 MHz band is presented. The Asymmetric Coplanar Strip (ACS) fed antenna consists of inverted L shaped monopole with a capacitive loading to provide necessary impedance matching and current distribution. The antenna has wide bandwidth from 790 MHz to 1050 MHz and from 2350 MHz to 2640 MHz coving the RFID UHF and Microwave frequencies. The uniplanar...
Digital broadcasting is the distribution of audio and/or video signals which transmit programs to an audience. The era of total digital broadcasting, from program production to digital receivers, will soon be upon us as a result of advances in image compression technology, higher integration and improved performance in LSI devices, and the rapid progress in digital technologies including the development...
This paper presents a modified loop capable of generating circular polarized wave at UHF, L and S bands. Modified loop comprise of loop and folded dipole antenna. The folded dipole was selected to ensure close loop as well as the introduction of N no. of folded dipoles for future research. Two modified loops for 3 and 5 radii were developed and tested. Simulated results were in agreement with practical...
In this paper, an inward scaled loop antenna (ISLA) is presented. It is created by successive scaling and rotating and fitting the scaled copies of a wideband loop antenna (WBLA) in the empty space available in it. The overall size of the antenna remains the same as that of the WBLA. The advantage of an ISLA is its improved input performance as compared to the WBLA. Impedance bandwidth of the order...
In this paper, design and development of rectangular sleeve dipole antenna covering more than an octave bandwidth (850-2500 MHz) is presented with measured results. Here a rectangular box type of sleeve is proposed over the cylindrical dipole elements. This antenna is compact in size and covers more than 2.9:1 bandwidth with maximum VSWR 3:1. The antenna was first simulated using CSTtrade microwave...
A very practical radiator in the HF (3-30 MHz), VHF (30-300 MHz) and UHF (300-3000 MHz) is Yagi-Uda antenna. The radiation characteristics that are usually of interest in the Yagi -Uda antenna are the forward and backward gains, input impedance, bandwidth, front to back ratio, VSWR and magnitude of minor lobes. In this paper the 4-element Yagi-Uda antenna is investigated for the frequency of 435 MHz...
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